Improvement in gauges for mortising-machines



STATES THOMAS BEACH, OF FREEPORT, PENNSYLVANIA.

IMPROVEMENT IN GAUGES FOR MORTISING-MACHINES.

Specification forming part of Letters Patent No. 116,538, dated July 4, 1871.

To all whom fit may concern:

Be it known that I, THOMAS BEACH, of Freeport, in the county of i/.krmstrongI and State of Pennsylvania, ha-ve invented a new and useful Improvement in Gauge for Mortising-Machine5 and l do hereby declare the tollowing to be a full, clear, and exact description thereof, reference being had to the accompanying drawing forming part ot' this speciiication, in which- Figure 1 is a front elevation of a mortisingmachine, showing my improvement; and Fig. 2 is a plan view of my improvement as applied to a mortising-machine.

Like letters of reference indicate like parts in each.

My invention consists in the construction otra gauge, by the use of which, in connection with a mortising-machine, l am enabled to mortise window-sash and other such articles without first laying them oif by rule, as has been necessary heretofore. y

To enable others skilled in the art to make and use my invention, l will describeits construction and manner of use.

The gauge-board a is made of wood or other suitable material, with lugs I; b, one at each. end, attached to its inner side or face. The lug I) is rigidly attached to the board, while the other Z1 is adjustable, being fastened to the end of a screw, c, which. works inward from the end of the board a, and which is supported by and works through two perforated and tapped lugs, d, extendin out from the face of the board. On the outside of the gauge-board a, and placed at any desired intervals thereon, is a series of wedgedshape stops, e, grouped in pairs or couples, with the incline of one falling away from the incline of the other, so that the butt ends of the two are in fard near each other. When the gauge is in use thepiece of woodj" to be mortised is placed against the inner face between the two lugs b b', and secured there by means of the adjustable one b. ln window-sash it is necessary that themortses should be exactly in place, therefore, for fear the boa-rd a, carrying the piece j", should slip, I make the stops c directly opposite to the pla-ce where the mortise is to be made, so that, whenused in connection with alocking device, they will hold the gauge firmly in place while the mortise is being made. The gauge, when in use, is set on the bench g of a mortising-inachine of the ordinary construction against a guide-board, i, running alon the side ofthe bench y, back of the chisel IL. Attached to the bench g, in front of the guideboard fi, is a spring-lock, 1.2, the tongue Z of which projects into the path of the stops e on the gauge board, so that, when the gauge-board is pushed along the guide fi., its tongue encounters the first stop e, slides up the incline, and drops or springs into the notch between the butt ends ofthe iirst two stops c c. The tongue l is divided into two parts, which, just inside of the frame k, are bent in opposite directions so as to form a shoulder, o, on each, and then are fastened to the stems n n, which project slightly through the back plate of the frame lc. In front of the shoulders 0 is a collar, p, which is connected with the inner ends of two small levers, on m, one on each side, and pivoted tothe side pieces of the framek and back of the shoulder, around the stoms a a, are two spira] springs, o', which, pressing against the shoulders o o, force the tongues L out into the path of the stops c. Thelevers m m are for withdra-wing vthe tongue Z from the notches formed by the stops e e, the spirals r r forcing the tongues out the instant the pressure is taken olf.

The gauge is used as follows A piece of wood,

j', is secured between the lugs b b', and the gaugeboard placed on the bench g against the guideboard i, and pushed along until the tongues l engage the iirst stop e, slide up the incline, and drop into the notch c. The gauge being then held immovable the mortising-chisel is operated and the mortise made. The workman next frees the gauge-brand by operating the levers m so as to withdraw the tongues Z l from the notch e', and slides it along until it comes to the next pair of stops, when the same operation is repeated, and so on until the whole is completed.

lt will be perceived tha-t by using a different gauge for each size, or by simply changing the relative positions of the stops e, any size of sash or other article may be mortised 3 also, that, instead ofthe signing-lock shown, any other known device for holdin the gauge in position may be used-such as a ratchet-rack along the side of the gauge operating in connection with a tongue, such devices being merely equivalents to those shown. collvenient and precise adjustment of the gauge under the chisel.

One of the great advantages of my improve- The tongue is made double for the more ment is the small expense attending the putting it into successful operation, since it eau be zipplied to any inoitisingniuehine Without any niaterizrl alteration thereof, und with a few moments Work.

What I eiaini as my invention, and desire t0 secure by Letters Patent, is-

l. A gauge-board, a, for ay niortising-inzwhine,

' having lugs b b, one at erich end 0n one side,

one at least of which is adjustable, and :L number 0i' stops, e, On the other' side at any desired intervals, constructed substantially as and for the purposes described.`

Vitnesses z A.. S. NICHOLSON, Tiros. B. KEER. 

